Single-piece compression molded fiberglass reinforced polyester composite or all cast aluminum construction. Die cast brass upper housing or single-piece molded silicone gasket to prevent water, dust, and insect filtration. Fasteners are 300 series stainless steel. Two (2) ½" conduit inlets at bottom. Note: Watertight connectors and potting compound (by others) must be used to maintain a watertight seal at conduit entry points.